Improvement in botaky steam valves



vinlf tutes atrnt @fge i IMPROVEMENT IN ROTARY STEAM VALVES.

lge tlg'e'tulr refertet tu in tlges lcltets ntellt mit mztkiirg :grat si.tlge same.

To ALL WnoM 1T inuzcoucnmv:

Be vit known thnt.I, .Luiss L. MACKEY, of Seymour, in the county ofJacksomand State of Indiana, have` invented a new and useful Improvementin Steam Valves; and I do hereby declare that the following is a full,clear, and exact description thereof, which will enable those skilled inthe art to make and use the same, reference being had to theaccompanyingdrawings, forming part of this specification, in which- Figure 1represents a transverse section of this invention as applicable to asingle cylinder, the plane of i section being indicated by the line z z,iig. 2.

Figure 2 is a. longitudinal central section ofthe same taken in theplane indicated by the line yy, iig. 3.

Figure 3 is a transverse section of the valve, showing its applicationto a steam cylinder.

Figure 4 is asimilar section of my valvewhen the'salneis adapted toa'double cylinder Woolf` engine.

Figure 5 is a longitudinal cenl'tralnsection of the same, the line z1:', iig. 4, indicating the plane of section.

Figure 6 'is a transverse sectiohof the same, the'plane ot' sectionbeing indicated by the line z e, iig. 5.

Figure 7 is a transverse section of a modification of my valvewhenupplied to a double-cylinder engine.

Figure 8 is a longitudinal central section of the saine, the line y y,iig. 7, indicating the plane of section.

Figure 9 is a transverse section of the same, taken in the planeindicated byi` the line z' z', g. 8.

Siniilhlettrs ofrei'erence indicate corresponding` parts.

This invention relates to a balance conical valve which is applicable toa single or double-cylinder engine, and which is composed of a hollbwmovable plug working in a sleeve which is tted into a suitable shell,that is cast solid with or otherwise rigidly attached to the steamcylinder, the plug valve, the sleeve, and the shell being provided'withsuitable steam exhaust ports in such a manner thatby giving to the plugvalve-an oscillating motion,tlie steam is alternately admitted to eitherend of the cylinder and the desired reciprocating motion is impartedtothe piston.

In its simplest form, when made .for a single-cylinder engine, my valveconsists of a hollow conical plug, A,

with al V- shaped partition, B, and with live ports, a a b c d. Thisplug is closed at both ends and ground airtight. A sleeve, C, which isprovided with four apertures, ecf f, and with a cap, g, through whichaset-screw may be introduced, such as shown in fig. 8, to k'eep the plugin its seat. V The sleeve, C, is tted into. the shell, D, which is castsolid with or otherwise, rigidly attached to the steam cylinder, E. Fromthis shell extend channels, h L, to the opposite ends ot' the cylinder,aud it is provided with two other apertures, it", one of i whichcommunicates with the steam supply and the other with the exhaust pipe.The sleeve, C, is sc adjusted in the shell, D, that the apertures, h h',correspond with the' apertures, f f, as shown in iig. 3, and theapertures, z', with the apertures, e e', as shown in gs. 1 and 2, andthe .plug A extends through the thin end of the sleeve and shell, and inpractice it must be provided with a lever by means ofwhich it can beturned so as to bring the aperture, b, alternately to coincide with theapertures f h, in the sleeve and shell, and then with the aperturesf h.At the same time the apertures c d, in the plug, .cover the apertures ez' e z", in the sleeve and shell, (see figs. 1 and 2,) and saidapertures c d are made oblong so that the plug can'bo oscillated withoutcovering either of said apertures. If the aperture, b, in the plugcoincides with the channel, It, (seeig. 3,) the aperture, a', coincideswith the.channel,h, and steam enters the cylinder and exhauststherefrom, as indicated by the arrows in fig. 3. If the plug is turnedso as to bring the aperture, 6, to coincide with the channel, h', theaperture, a, coincides with the channel, h, and the steam is reversed Byadmitting the steam under the V-shaped'partition, B, all unequal orone-sided strain on the plug is avoided, and said plug is made tooperate easy under any pressure; and furthermore, by introducing thesleeve, C, between the plug andthe shell,`the seat of the plug is mademovable, so that it can be readily bored out and the valve fitted in,even if the shell, D, should be cast solid with the steam cylinder andif the plug requires to be reiitted the operation is-renderedcomparatively easy. l l

' If my valve is to be applied. to a Woolf engine, with two cylinders ofunequal diameters, the steam being rst introduced into the smallcylinder, arid as it exhausts from the same into the large cylinder, itis constructed either in the manner shown in gs. 4, 5, and 6, or inthemanner shown in figs. 7, 8, and 9. In the valve shown in figs-4, 5, and6,*thc plug A, V-shuped partition B, sleeve C, and shell D, are like thecorresponding parts previously described, but the plug is provided witheight 'apertures,jj k l l k' c d, the apertures jj' lc, being on theconcave, and the apertures Z 7c Z c on' the convex side of the V-shapedpartition B. The apertures 7c communicate by a channel, m, which passesthrough the V-shaped partition B. The sleeve C and shell D are eachprovided with six apertures, fff f* ele', in the shell D, and L h t* z*in the shell. The apertures i e', connect with the'steam su'pplypipe,and the apertures e with the exhaust pipe, and the apertures c d n theplug are oblong to allow of imparting to said plug an oscillatingmotion, Without closing the communication with the steam and exhaustpipes. The apertures It h in the shell communicate with theop'positcends of the small cylinder F, and the channels h* L*, with the endsofthe large cylinder G. If the plug is turned so `that ths aperture j inthe same coincides with the aperturesfh, inthe sleeve and shell, theaperture k will coincide `with the apertures f L', and the steam entersthe small cylinder as shown in fig. 4. At the same time the .aperture ftcoincides with the apertures f* It", and the aperture l' with theapertures f* 11", and the steam apertures jj 7c k l l c d, substantiallyas and for the purpose set forth.

lexhausting from the small cylinder passes through the channels m andh"*, and apertures f* l', asindicated by arrows in fig. 4. If the valveis turned so as to bring the channel k to coincide with the apertures fh, the steam is reversed. If' thc two cylinders F G, instead of being 4placed side by side, as shown in fig. 4, are placed end 'to end, asshown in iig. 7, the arrangement of the valve is such as shown in figs.7, 8, and 9. The channel m, instead of passing through the V-shapedpartition, divaricates and straddles the same, and connects throughchannels h or h', with the opposite ends of the small cylinder F, andthrough channels h* or L*, with the opposite ends of the' large cylinderG. In the position in which the valve is shown in iig. 7, the steamenters the small cylinder through the channel h, and it exhausts fromthe same through the channels h m* m z*, into the vlarge cylinder fromwhich it exhausts through the channel hfl, and through the valve intothe exhaust channel d. It will be noticed 'that in all three cases whichI have described, the steam enters my valve at the concave side of thepartition B, and it exhaustsitherefrom at the convex side. Theadditional channels and openings shown in figs. 4 to 9, are necessitatedonly if the valve is to be used with two cylinders. The sleeve isprovided with a cap, so that access can be had to the interior of thevalves for the purpose of lubrication.

What I claim as new, and desire to secure by Letters Patent, is

1. The valve A, with a V-shaped partition and apertures c d a a' 6,*incombination with the sleeve C, l

and shell D, constructed and operating substantially as and for thepurpose described.

2. The transverse channel m, in combination with the hollow plug-valveA, V-shaped partition B, and `with JAMES 'L MAoKEv.

Witnesses:

F. M. PArrEssoN, L. E.'Ii.1mmr.r..A

